Fieldbus Foundation India Marketing Committee. Fieldbus Foundation End Users Council Conference Wireless LANs in Industrial Environments

Transcription

1 Fieldbus Foundation India Marketing Committee Fieldbus Foundation End Users Council Conference-2009 Date : 19 th June, 2009 ( Friday ) Time : from 09:00 am to 06:00 pm. Venue : The Maratha, Sahar Road, Andheri (East) Mumbai Wireless LANs in Industrial Environments Author: Mark Cooksley Belden Automation 1

2 Contents Wireless Technology Wireless Case Study Conclusion 2

3 Contents Wireless Technology Wireless Case Study Conclusion 3

4 ISM / UNII Bands UHF SHF 300 MHz 3 GHz 30 GHz 2.4 GHz 5 GHz ISM Industrial, Scientific and Medical UNII Unlicensed National Information Infrastructure 4

5 Standards a/h b g n 54Mb/s 5 GHz 11Mb/s 2.4 GHz 54Mb/s 2.4 GHz 300Mb/s 2.4GHz & 5GHz 5

6 2.4 GHz band 2,3 GHz 2,5 GHz GHz CH-ID f (MHz) USA x x x x x x x x x x x EU x x x x x x x x x x x x x 6

7 Direct Sequence Spread Spectrum

8 Frequency planning

9 OFDM - Orthogonal Frequency Division Multiplexing 30 MHz 30 MHz Frequency Sub-channels Frequency 9

10 10 Basic Elements - Access Points

11 Basic Elements Access Clients PCI Cards PCI Cards USB Adapters USB Adapters PC Cards PC Cards USB Sticks USB Sticks 11

12 12 Wireless Bridge

13 Antennas and Accessories Omnidirectional Omnidirectional Directional Directional Cables, Pigtails Cables, Pigtails Lightning Protection Lightning Protection 13

14 Basic Service Set (BSS) Each BSS has a Service Set Identifier (SSID) BSS = Cell 14

15 Multiple SSIDs per Wireless Interface SSIDs mapped to VLANs Second SSID Segregation Reduced cost Different Client capabilities Migration Public / private networks First SSID Third SSID 15

16 Topologies - Infrastructure Network BSS LAN 16

17 Topologies - Wired Distributions System ESS BSS1 BSS2 17 ESS - Extended Service Set

18 Topologies - Wireless Distribution System )))) )))) )))) )))) )))) )))) ESS BSS1 BSS2 18

19 Multi-channel Roaming Stations can change their frequency dynamically when they are re-directed to another access point. Frequency 1 Frequency 2 Frequency 3 Frequency 1 19

20 WLAN - An invitation to hackers? UNIVERSITY 20

21 Hacker Scenarios Your company Spoofing Sniffing Hijacking Denial of service (DoS) 21

22 Security Mechanisms MAC address Network name (SSID) Encryption Authentication 22

23 Contents Wireless Technology Wireless Case Study Conclusion 23

24 Project Background International petrochemical company New hub in Singapore $4 billion investment Major distribution centre for South East Asia New WLAN 24

25 25 Geographic Layout

26 Customer Objectives What will the customer achieve with their WLAN? Save $ millions per year in improved process efficiency. Faster plant commissioning Guarantee technological flexibility / Future-proofing Improve plant safety 26

27 Network Objectives Provide wireless access from anywhere in the production area to the refining process Production area is ATEX Zone 2 Use combined wired and wireless network infrastructure Protect network against unauthorised access Use network management system for surveillance and maintenance 27

28 Reasons for using wireless Benefits: Less need for local panels Increased field operability / visibility Local advanced diagnostics direct access to everywhere Future proof multipurpose Ethernet backbone with LAN and WLAN connections (VLAN and Multi-SSID for Video, Voice, Data) Flexibility and cost savings: Operators can react in the field and system is engineered for future expansions 28

29 Design challenges End-to-end solution - from design to installation including all hardware and services) Requirements for hardware with explosion certification (ATEX Zone 2) & IEC system compliancy WLAN design based on plot plans Real outdoor process environment (lots of metal interference & reflections) Network design - Backbone with HIPER-Ring and WLAN Point-to-Point Links Harsh environmental conditions (lightning, high temperature, high humidity, salty air, ) 29

30 30 The Starting Point

31 31 WLAN Design 3D CAD Model of the plant: Location of Access Points, free line of sight WLAN Simulation by RF CAD modeling software: coverage, bandwidth, interference Frequency plan for whole system Defining LAN, interfaces, patch panels Firewall rules and security aspects Detailed documentation of whole system: Overview Network Architecture List of material Cable List Function Design Specification

32 32 Simplified WLAN Design

33 Specific Solutions Required Laptop with explosion and T4 certification Lightning protection for exposed positions External box with power supply and media converter Sun shelter for power supply box Firmware adaptations for Access Points Engineering of Network Management System 33

34 34 Network Management

35 Staging Proof of concept testing Factory Acceptance Test Integrated FAT Site Acceptance Test 35

36 36 Long Term Commitment 05/07 12/07 01/08 03/08 04/08 05/08 09/08 10/ (now) 2010 (est) Project Timeline Tender 1 st Quote Official Order Network Design Functional Design Spec. Re-quote Proof of Concept F.A.T. Integrated FAT Site Acceptance Test Hand-Over

37 Contents Wireless Technology Wireless Case Study Conclusion 37

38 Conclusion When correctly implemented, wireless can provide a robust and secure network backbone Even conservative corporations want to benefit from the advantages of wireless Wireless is now a credible alternative to cables in an industrial environment 38

39 Contents Wireless Technology Wireless Case Study Conclusion Any questions? 39